Twin strands of DNA seek each other out 11:38 28 January 2008 NewScientist.com news service Andy Coghlan Just like twins recognising and approaching each other across a crowded room, it now turns out that identical stretches of double-stranded DNA seek each other out in solution. The unexpected finding could shed new light on how DNA repairs itself, how diseases such as cancer result from the miscopying of DNA, and how genes become tweaked during evolution. Although the capacity for single complementary strands of DNA to attract each other is probably the best-known and most fundamental property of DNA, no-one knew...